Siemens SCALANCE XRH-300 Product Manual page 53

Notes for use in hazardous locations according to ATEX, IECEx, UKEX and CCC Ex
If you use the device under ATEX, IECEx, UKEX or CCC Ex conditions you must also keep to the
following safety instructions in addition to the general safety instructions for protection against
explosion:
Transient overvoltages
Take measures to prevent transient overvoltages of more than 40% of the rated voltage (or
more than 119 V). This is the case if you only operate devices with SELV (safety extra-low
voltage).
Suitable cables at high ambient temperatures in hazardous area
At an ambient temperature of ≥ 60 °C, use heat-resistant cables designed for an ambient
temperature at least 20 °C higher. The cable entries used on the enclosure must comply with
the IP degree of protection required by EN IEC / IEC 60079-0, GB 3836.1.
EXPLOSION HAZARD
Do not connect or disconnect cables to or from the device when a flammable or combustible
atmosphere is present.
EXPLOSION HAZARD
The USB console interface is intended to serve as a service interface for repairs, commissioning
and maintenance. Remove the USB plug before you operate the device in a hazardous
atmosphere.
EXPLOSION HAZARD
Electrical connectors including SFP/SFP+ transceivers must not be connected to the device or
disconnected from the device in a hazardous atmosphere.
EXPLOSION HAZARD
Do not press the SELECT/SET button when there is an explosive atmosphere.
SCALANCE XRH-300/XRM-300
Equipment Manual, 10/2022, C79000-G8976-C546-01
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
Connecting up
6.1 Safety when connecting up
53